Mastercool Inc., manufactures the MA98210-A Accu-Charge II Electronic Refrigerant Scale, so that a professional mechanic doesn't have to use a pinch of this and a smidge of that, to create the perfect air conditioning charge. This Mechanics Tool allows the user to program desired quantities. Before charge is complete, an alarm will sound allowing ample time to turn off refrigerant supply. The user can also stop or pause the air conditioning charge function, or allow the scale to do the job automatically.
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